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Geothermal Heating and Cooling Cost
    Garnavillo, Iowa

  • Type of home: Single family, one story
  • Unique features: Finished walk-out basement with supp. electric heat
  • Living space: 3,600 square feet
  • Winter design heat loss: 45,599 Btu/hour
  • Summer design heat gain: 29,774 Btu/hour
  • Installation: Three-ton Water Furnace
  • Horizontal loop: 2,500 feet of polyethylene pipe
  • Heating season: $591.00 (7,385 kWh)
  • Cooling season: $139.00 (1,262 kWh)
    Bryant, Iowa

  • Type of home: Single family, one story
  • Unique features: 1,900 square feet on main floor with heated basement
  • Living space: 3,800 square feet including basement
  • Winter design heat loss: 59,546 Btu/hour
  • Summer design heat gain: 28,417 Btu/hour
  • Installation: Four ton Florida Heat Pump
  • Installed: Fall 1996
  • Vertical loop: Six wells at 100 feet each
  • Heating season: $560.00 (7,000 kWh)
  • Cooling season: $132.00 (1,200 kWh)
    LeRoy, Minnesota

  • Type of home: Single family, one story
  • Unique features: Ranch-style home with full basement
  • Living space: 2,000 square feet
  • Winter design heat loss: 58,095 Btu/hour
  • Summer design heat gain: 23,759 Btu/hour
  • Installation: Four ton, two speed Water Furnace
  • Horizontal loop: 2,400 feet of polyethylene pipe
  • Heating season: $841.00 (10,518 kWh)
  • Cooling season: $119.00 (1,085 kWh)
    Dubuque, Iowa

  • Type of home: Single family, one story
  • Unique features: Radiant floor heat and heated garage
  • Living space: 1,934 square feet, plus 936 sq. ft. garage
  • Winter design heat loss: 39,834 Btu/hour house,
  • 22,308 Btu/hour garage
  • Summer design heat gain: 18,612 Btu/hour house,
  • 8,628 Btu/hour garage
  • Installation: Three ton WaterFurnace
  • Horizontal loop: 2,500 feet of polyethylene pipe
  • Heating season: $676.00 (8,451 kWh)
  • Cooling season: $322.00 (2,923 kWh)
Attempting to answer the question
"How much does geothermal
heating and cooling cost?" is like
tyring to answer "How many miles
per gallon does a car get?"

Rather than offer up the same old
"costs 60% less than propane or
fuel oil," I've located a few real life
examples of what it costs to heat
and cool homes of various sizes
with a geothermal heat pump.

The heating and cooling costs
reflect current average electric
rates charged by Alliant Energy,
the utility that supplies electricity to
the example homes shown below.  
Average Winter Rate: $0.08/kWh -  Average Summer Rate: $0.11/kWh